Preheat your air fryer to 350°F.
In a large mixing bowl, whisk together the oat flour, vanilla protein powder, baking powder, and sea salt until well combined.
Add the Greek yogurt and egg white to the dry ingredients, folding them in with a spatula until a thick, uniform dough forms.
Lightly flour your hands and roll the dough into small, bite-sized balls, approximately 1 inch in diameter.
Place the dough bites into the air fryer basket in a single layer, ensuring they are not touching to allow for even airflow.
Air fry for 6 to 8 minutes, or until the bites have puffed up and are lightly golden brown on the outside.
While the bites are cooking, whisk together the maple syrup, almond milk, and vanilla extract in a small bowl to create the glaze.
Remove the warm donut bites from the air fryer and immediately toss them in the glaze until thoroughly coated.
Serve immediately while warm for the best texture.